develooper Front page | perl.perl5.porters | Postings from January 2003

Re: benchmarking - it's now all(-1,0,1,5,6)% faster

Thread Previous | Thread Next
Peter Nimmervoll
January 12, 2003 11:12
Re: benchmarking - it's now all(-1,0,1,5,6)% faster
Message ID: wrote:

>Nicholas Clark <> wrote:
>:So I'm confused. It looks like some bits of perl are incredibly sensitive to
>:cache alignment, or something similar. And as a consequence, perlbench is
>:reliably reporting wildly varying timings because of this, and because it
>:only tries a few, very specific things. Does this mean that it's still useful?
>I think I remember seeing a profiler that emulates the x86 instruction set,
>and so can give theoretically exact timings. Does this ring a bell for
>anyone? I don't know if the emulation extended to details such as RAM
>and cache sizes ...
Do you mean Valgrind ?
You can get it from



Thread Previous | Thread Next Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at | Group listing | About